Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 UID: 0 PID: 5231 Comm: udevd Not tainted 6.11.0-rc5-next-20240827-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:____rb_erase_color lib/rbtree.c:354 [inline] RIP: 0010:__rb_erase_color+0x2d7/0xa30 lib/rbtree.c:413 Code: 73 02 00 00 49 8d 5c 24 10 48 89 dd 48 c1 ed 03 42 80 7c 35 00 00 74 08 48 89 df e8 a3 6a 44 f6 4c 8b 2b 4d 89 ef 49 c1 ef 03 <43> 80 3c 37 00 74 08 4c 89 ef e8 8a 6a 44 f6 41 f6 45 00 01 48 89 RSP: 0018:ffffc900036272c0 EFLAGS: 00010046 RAX: 000000000016e360 RBX: ffff888017ad00a0 RCX: dffffc0000000000 RDX: ffffffff81680de0 RSI: ffff8880b913ebc8 RDI: ffff888017ad0090 RBP: 1ffff11002f5a014 R08: 00000000000003bb R09: 0000000000000000 R10: ffff888066c95a98 R11: ffffffff81671a60 R12: ffff888017ad0090 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 00007f10b96d3c80(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3261eff8 CR3: 0000000064c60000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rb_erase_augmented include/linux/rbtree_augmented.h:331 [inline] rb_erase_augmented_cached include/linux/rbtree_augmented.h:340 [inline] __dequeue_entity+0x953/0xd30 kernel/sched/fair.c:863 set_next_entity+0xfe/0x4c0 kernel/sched/fair.c:5559 set_next_task_fair+0x1dd/0x540 kernel/sched/fair.c:13151 set_next_task kernel/sched/sched.h:2434 [inline] pick_next_task kernel/sched/core.c:6085 [inline] __schedule+0x250c/0x4b30 kernel/sched/core.c:6632 preempt_schedule_notrace+0x100/0x140 kernel/sched/core.c:6949 preempt_schedule_notrace_thunk+0x1a/0x30 arch/x86/entry/thunk.S:13 rcu_read_unlock_sched_notrace include/linux/rcupdate.h:971 [inline] find_stack lib/stackdepot.c:579 [inline] stack_depot_save_flags+0x287/0x830 lib/stackdepot.c:618 kasan_save_stack mm/kasan/common.c:48 [inline] kasan_save_track+0x51/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4040 [inline] slab_alloc_node mm/slub.c:4089 [inline] kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4096 locks_alloc_lock fs/locks.c:275 [inline] flock_lock_inode+0x2ee/0x1460 fs/locks.c:1091 flock_lock_inode_wait fs/locks.c:2084 [inline] locks_lock_inode_wait+0x108/0x460 fs/locks.c:2111 locks_lock_file_wait include/linux/filelock.h:417 [inline] __do_sys_flock fs/locks.c:2181 [inline] __se_sys_flock+0x504/0x6c0 fs/locks.c:2135 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f10b9316fc7 Code: ae 30 fa ff 48 8b 04 24 eb 05 e8 ec 33 00 00 48 83 c4 68 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 49 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 31 9e 0d 00 f7 d8 64 89 01 48 RSP: 002b:00007fff4ffd7778 EFLAGS: 00000202 ORIG_RAX: 0000000000000049 RAX: ffffffffffffffda RBX: 000055c0e0cbfd00 RCX: 00007f10b9316fc7 RDX: 00000000000a0800 RSI: 0000000000000005 RDI: 0000000000000008 RBP: 000055c0e0cbfd00 R08: 00000000ffffffff R09: 7fffffffffffffff R10: 0000000000000000 R11: 0000000000000202 R12: 000055c0e0c9f2d0 R13: 000055c0e0cb0760 R14: 0000000000000008 R15: 000055c0e0c9e910 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:____rb_erase_color lib/rbtree.c:354 [inline] RIP: 0010:__rb_erase_color+0x2d7/0xa30 lib/rbtree.c:413 Code: 73 02 00 00 49 8d 5c 24 10 48 89 dd 48 c1 ed 03 42 80 7c 35 00 00 74 08 48 89 df e8 a3 6a 44 f6 4c 8b 2b 4d 89 ef 49 c1 ef 03 <43> 80 3c 37 00 74 08 4c 89 ef e8 8a 6a 44 f6 41 f6 45 00 01 48 89 RSP: 0018:ffffc900036272c0 EFLAGS: 00010046 RAX: 000000000016e360 RBX: ffff888017ad00a0 RCX: dffffc0000000000 RDX: ffffffff81680de0 RSI: ffff8880b913ebc8 RDI: ffff888017ad0090 RBP: 1ffff11002f5a014 R08: 00000000000003bb R09: 0000000000000000 R10: ffff888066c95a98 R11: ffffffff81671a60 R12: ffff888017ad0090 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 00007f10b96d3c80(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3261eff8 CR3: 0000000064c60000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 73 02 jae 0x4 2: 00 00 add %al,(%rax) 4: 49 8d 5c 24 10 lea 0x10(%r12),%rbx 9: 48 89 dd mov %rbx,%rbp c: 48 c1 ed 03 shr $0x3,%rbp 10: 42 80 7c 35 00 00 cmpb $0x0,0x0(%rbp,%r14,1) 16: 74 08 je 0x20 18: 48 89 df mov %rbx,%rdi 1b: e8 a3 6a 44 f6 call 0xf6446ac3 20: 4c 8b 2b mov (%rbx),%r13 23: 4d 89 ef mov %r13,%r15 26: 49 c1 ef 03 shr $0x3,%r15 * 2a: 43 80 3c 37 00 cmpb $0x0,(%r15,%r14,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 4c 89 ef mov %r13,%rdi 34: e8 8a 6a 44 f6 call 0xf6446ac3 39: 41 f6 45 00 01 testb $0x1,0x0(%r13) 3e: 48 rex.W 3f: 89 .byte 0x89